If `tanbeta = costheta*tanalpha` , then `tan^2(theta/2)` is equal to

If tanbeta=costhetatanalpha , then "tan"^(2)(theta)/(2) =

If cos2theta+9sin2theta-6sintheta+54costheta=1, then the value of 100 tan^2theta +9+14 is equal to

If cos2theta+9sin2theta-6sintheta+54costheta=1, then the value of 100 tan^2theta +9+14 is equal to

If costheta_1 =2costheta_2, then tan((theta_1-theta_2)/2)tan((theta_1+theta_2)/2) is equal to (a) 1/3 (b) -1/3 (c) 1 (d) -1

If costheta_1 =2costheta_2, then tan((theta_1-theta_2)/2)tan((theta_1+theta_2)/2) is equal to (a) 1/3 (b) -1/3 (c) 1 (d) -1

If alphaandbeta are such that tanalpha=2tanbeta , then what is sin(alpha+beta) equal to ?

If costheta=cos alphacosbeta, then tan((theta+alpha)/(2))tan((theta-alpha)/(2)) is equal to

If costheta=cos alphacosbeta, then tan((theta+alpha)/(2))tan((theta-alpha)/(2)) is equal to

If sintheta=costheta then 2tan^(2)theta+sin^(2)theta-1=___ .